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splitter #1295972
09/12/2011 16:52
09/12/2011 16:52

J
jonone
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jonone
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this turned up today.

after reading a bit about splitters in conjunction with undertrays i thought i would try it to see if it makes the front end more stable? its made from plastic and its quite flexable.... so how well it will work i dont know? probably more show then go laugh

its going to be a bit of an experiment to get it to attach so its solid but allows the undertray to be removable, it can be made to stick out quite far but then its less securely attached i need to trim my bumper so the lump in the middle fits,also depending on how far you put it foward relates to how far the ends stick out in the arch's! i may need to trim them..... it would probably work better with le lips or zenda bumper.

general idea

roughly same shape as le kit

Re: splitter [Re: ] #1295983
09/12/2011 17:28
09/12/2011 17:28
Joined: Dec 2005
Posts: 1,676
Didcot - Oxon
RusH Offline
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Posts: 1,676
Didcot - Oxon


Coupe now sold!
Re: splitter [Re: ] #1295986
09/12/2011 17:41
09/12/2011 17:41

J
jonone
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jonone
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J



no, its lester but thats very similar apart from it would be straight across at the front with the std bumper.

Re: splitter [Re: ] #1295999
09/12/2011 19:22
09/12/2011 19:22

N
nismo
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nismo
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N



where did you get yours from Jonone ?

Re: splitter [Re: ] #1296013
09/12/2011 19:58
09/12/2011 19:58

J
jonone
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jonone
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J



i got mine from here but had a bit of a nightmare getting it partly because they have updated the website which does not show the coupe stuff at the moment.

Re: splitter [Re: ] #1296030
09/12/2011 21:17
09/12/2011 21:17

N
nismo
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nismo
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N



cheers for the link

Re: splitter [Re: ] #1296389
11/12/2011 10:30
11/12/2011 10:30
Joined: Oct 2010
Posts: 555
Bulgaria
Ferrarist Offline
Enjoying the ride
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Posts: 555
Bulgaria
Mod's like this did'nt improve front or rear stability, simply because they can not create "diffuser" type of suction. Only gain is that it looks nice, and can add a bit of extra top speed......
Best thing to do is to flat your underfloor as much as possible, smooth the shape of everything that can create drag, especially on the rear of the car.


20VT - Alfa 156 2.0 - Alfa 156 Mid-Engined RWD - Locost 20VT

Re: splitter [Re: ] #1296395
11/12/2011 10:46
11/12/2011 10:46

N
nismo
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nismo
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N



Originally Posted By: jonone
had a bit of a nightmare getting it partly because they have updated the website which does not show the coupe stuff at the moment.


i see what you mean as i can't find it anywhere frown

Re: splitter [Re: ] #1296440
11/12/2011 13:39
11/12/2011 13:39

J
jonone
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jonone
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J



Originally Posted By: nismo
Originally Posted By: jonone
had a bit of a nightmare getting it partly because they have updated the website which does not show the coupe stuff at the moment.


i see what you mean as i can't find it anywhere frown


your be better off ringing them.

Re: splitter [Re: Ferrarist] #1296455
11/12/2011 14:42
11/12/2011 14:42

J
jonone
Unregistered
jonone
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J



Originally Posted By: Ferrarist
Mod's like this did'nt improve front or rear stability, simply because they can not create "diffuser" type of suction. Only gain is that it looks nice, and can add a bit of extra top speed......
Best thing to do is to flat your underfloor as much as possible, smooth the shape of everything that can create drag, especially on the rear of the car.


this thread is quite interesting ferrarist, people who know more than me have commented.

Re: splitter [Re: ] #1296461
11/12/2011 15:14
11/12/2011 15:14
Joined: Oct 2010
Posts: 555
Bulgaria
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Bulgaria
Yes, had a look to it, thanks....
Stock Coupe stands too high from the ground to create real downforce via pressure difference(diffuser type of downforce), and if lowered, only drag can be reduced, additional downforce will be insignificant.
And a REAL diffuser, creating real downforce and less drag must be wind tunneled before really can do it's job, and this is way too complicated for a road car.
For me, all this splitter and undertray stuff only adds good look to the car, and keeps engine bay dry and clean from all puddle things on the road.

Last edited by Ferrarist; 11/12/2011 15:15.

20VT - Alfa 156 2.0 - Alfa 156 Mid-Engined RWD - Locost 20VT

Re: splitter [Re: ] #1296473
11/12/2011 15:49
11/12/2011 15:49

J
jonone
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jonone
Unregistered
J



You maybe right regarding downforce and pressure difference but as stated by per and rich( the way i understand it), even if the spitter only produces a slight amount of measured down force the "up side" is it will reduce "lift" i.e. stop the nose raising at high speed resulting in stability.
As for the undertray, having a slightly flat floor helps because it reduces pockets of air forming causing drag and lifting up the front , allowing the air to flow under the car quicker.....i believe fiat put it on the car for this reason also,.
i also think a splitter does not need to be tested to help stop "lift" as long as it is strong enough and sticks out far enough, it will help stop the front end lifting.

Re: splitter [Re: ] #1296477
11/12/2011 15:57
11/12/2011 15:57

J
jonone
Unregistered
jonone
Unregistered
J



someone else's view not scientific mind! tongue

Re: splitter [Re: ] #1296482
11/12/2011 16:20
11/12/2011 16:20
Joined: Oct 2010
Posts: 555
Bulgaria
Ferrarist Offline
Enjoying the ride
Ferrarist  Offline
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Joined: Oct 2010
Posts: 555
Bulgaria
Originally Posted By: jonone
someone else's view not scientific mind! tongue

Yes, interesting topic, splitter is combined with large front undertray.
Anyway, diffuser and undercar aerodynamic is very complicated science, and we can only follow few basic rules here......


20VT - Alfa 156 2.0 - Alfa 156 Mid-Engined RWD - Locost 20VT

Re: splitter [Re: ] #1296487
11/12/2011 16:41
11/12/2011 16:41

S
sediciRich
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sediciRich
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S



This old chesnut. You have to reduce all lift before you get to downforce. A splitter regardless of size will usually cut lift to varying degrees, the one shown in this thread is very small and would only reduce lift by a small amount but at very high speeds 100+ It would have some effect, whether you'd notice anything at normal motorway speeds or on a track I'm not sure. what you can say about splitters that extend a decent amount lets say 6 inches out is they can create enough force to make true down force about that axle. Worth noting though force created about an axle line will have a leverage force making an oppsite moment at the opposite axle thus a big splitter levering the front of the car down can be lifting the rear of the car (assuming the splitter didnt create the side benefit of reducing rear lift by lowering the amount of air under the car). Anyway that real race car stuff, for a road car cutting drag is a useful thing to do especially for fuel economy - flat bottoms and reducing the air going under the car help this.

Reding the OP, if the splitter was to create a downward force in isolation (NB not overcoming the other lift forces created by the car to record a true downforce thus only a reduction in lift) consider what the force might be, say it was 30kg (It wont be you'd need a more convincing splitter for that for the speed we are talking about) then consider how strong the attachment would need to be to put up with that force if it flexes it proably wont help. Plenty of people I raced with, many with very expensive cars still had painted plywood splitters firmly attached - cheap to repair!!

Last edited by sediciRich; 11/12/2011 16:42.
Re: splitter [Re: ] #1296672
11/12/2011 23:55
11/12/2011 23:55

J
jonone
Unregistered
jonone
Unregistered
J



thanks rich,
i realise how firmly attached the splitter needs to be, leading me to think about how firmly the bumper is attached as the force will effect the bumper fittings putting strain on them also.

Re: splitter [Re: ] #1326853
20/03/2012 19:23
20/03/2012 19:23

J
jonone
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jonone
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J



on the car now, needs a bit of work as i need to get it fit with the undertray, but it looks like this, I doubt it does a lot...... but it looks nice!
another angle dangle

Re: splitter [Re: ] #1326865
20/03/2012 19:53
20/03/2012 19:53
Joined: Feb 2007
Posts: 3,486
London Tan
technics Offline
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London Tan
Thats really nice Jon and looks very factory.


Now in the 400+ bhp club!
Re: splitter [Re: ] #1326971
21/03/2012 08:18
21/03/2012 08:18

D
damiengt
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damiengt
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D



i like it smile can i ask how much you paid for it smile

Re: splitter [Re: ] #1326998
21/03/2012 09:38
21/03/2012 09:38

J
jonone
Unregistered
jonone
Unregistered
J



It was about £100, you might have trouble finding one though?

Re: splitter [Re: ] #1327141
21/03/2012 15:50
21/03/2012 15:50

D
damiengt
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damiengt
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D



ye probs but i made one that looked the same for my old nissan primera gt le from another car smile

im just looking for something that makes the front bumber look abit better(imo)on the coupe. might save up and get an after market front and rear bumper smile

Re: splitter [Re: ] #1327359
22/03/2012 00:15
22/03/2012 00:15
Joined: Dec 2006
Posts: 1,360
stockport
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stockport
many years ago i had a delta HF turbo IE nice car but when you got to high speed it was like driving on ice so after reading yes reading a book on aerodynamics i made a MDF splitter a lot bigger than the one in the pics about 5 inches in front of the bottom part of the bumper about level with the front of the bumper lots of bolting and supports.... and what a difference to the car at high speed no more floating round the motorway it stuck to the road to the point were i could drive the car to the rev limiter in 5th and keep it there without it staining my underpants so a splitter is worth every penny you pay for it.... i know long story

Re: splitter [Re: ] #1327427
22/03/2012 10:18
22/03/2012 10:18

J
jonone
Unregistered
jonone
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J



its nice to hear someones real world experiences, I have read similar things on the net so it shows they really can work.

unfortunately my splitter is not big enough /strong enough to be moved forward further, so it will have less effect than yours did.

I was talking to barbz and i suggested to him to make a combined splitter and undertray out of a large sheet of alloy that extended away in front of the bumper.

Re: splitter [Re: ] #1327442
22/03/2012 10:35
22/03/2012 10:35
Joined: Dec 2005
Posts: 9,706
Gone
J
Jimbo Offline
Je suis un Coupé
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J

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Posts: 9,706
Gone
It looks really good even if you think it does little in the way of aerodynamics.

I can't remember the name of the body kit that added an extra few inches to the bottom lip of the standard front bumper, I think JohnS had it on his coupe?

Re: splitter [Re: ] #1327448
22/03/2012 10:49
22/03/2012 10:49

J
jonone
Unregistered
jonone
Unregistered
J




Re: splitter [Re: ] #1327451
22/03/2012 11:00
22/03/2012 11:00
Joined: Dec 2005
Posts: 9,706
Gone
J
Jimbo Offline
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J

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Posts: 9,706
Gone
No, it fastened to a standard coupe bumper and was just a lower lip extension that protruded a few extra inches.

Let me have a trawl and see if I can find it.

Re: splitter [Re: Jimbo] #1327454
22/03/2012 11:06
22/03/2012 11:06
Joined: Dec 2005
Posts: 9,706
Gone
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Jimbo Offline
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Low and behold a picture of JohnS coupe crops up in the search.
click to enlarge

click to enlarge

It doesn't look too dissimilar from yours looking at the picture now.


Last edited by Jimbo; 22/03/2012 11:07.
Re: splitter [Re: ] #1327478
22/03/2012 11:48
22/03/2012 11:48

J
jonone
Unregistered
jonone
Unregistered
J



ah yes not seen that before, i thought it was a whole bumper.

Is it not called cadamuro? the auto ds bumper looks similar, maybe thats why its called CADAmuro?

Re: splitter [Re: ] #1327489
22/03/2012 12:13
22/03/2012 12:13
Joined: Dec 2005
Posts: 9,706
Gone
J
Jimbo Offline
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Posts: 9,706
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It is Cadamuro, I believe its full name was front under bumper spoiler? It looks like a full front bumper on the Porto which I believe was Phils coupe because he'd had it smoothed in.

I actually bought one of these when I first bought the Vinci but decided against it and sold it to a guy near Barnsley who had a green coupe.

Re: splitter [Re: ] #1327498
22/03/2012 12:40
22/03/2012 12:40
Joined: Apr 2006
Posts: 5,404
Anglesey N.Wales
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Anglesey N.Wales
here is the cada front under bumper spoiler better pic this was the old L@M car
http://i53.photobucket.com/albums/g45/cowboykarl/192d-1.jpg

Last edited by cowboy; 22/03/2012 12:41.

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